Classification
330 - Economics
106
000 - Computer science, information & general works
102
580 - Plants (Botany)
100
630 - Agriculture & related technologies
75
700 - The arts; fine & decorative arts
75
600 - Technology
70
320 - Political science
69
610 - Medicine & health
66
333 - Economics of land & energy
63
620 - Engineering & allied operations
59
363 - Other social problems & services
52
900 - History & geography
29
551 - Geology, hydrology & meteorology
28
540 - Chemistry & allied sciences
20
380 - Commerce, communications & transportation
19
581 - Specific topics in natural history
17
340 - Law
16
576 - Genetics & evolution
13
140 - Specific philosophical schools
11
300 - Social sciences
10
612 - Human physiology
10
720 - Architecture
10
658 - General management
8
414 - Phonology & phonetics
7
500 - Natural sciences & mathematics
7
664 - Food technology
6
800 - Literature & rhetoric
4
370 - Education
3
530 - Physics
3
100 - Philosophy & psychology
2
360 - Social problems & services; associations
2
400 - Language
2
613 - Personal health & safety
2
615 - Pharmacology & therapeutics
2
640 - Home & family management
2
657 - Accounting
2
770 - Photography, photographs & computer art
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
338 - Production
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
547 - Organic chemistry
1
570 - Life sciences; biology
1
631 - Techniques, equipment & materials
1
632 - Plant injuries, diseases & pests
1
668 - Technology of other organic products
1